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Finding the Fourth Proportional to 487,000.70, 730,501.05 and 319,039.10

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Solution

The fourth proportional to 487,000.70, 730,501.05 and 319,039.10 is: 478,558.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,000.70 : 730,501.05 = 319,039.10 : x
  2. Step 2: Convert to fraction form
    487,000.70/730,501.05 = 319,039.10/x
  3. Step 3: Cross multiply
    487,000.70x = 730,501.05 × 319,039.10
  4. Step 4: Simplify right side
    487,000.70x = 233,058,397,541.06
  5. Step 5: Solve for x
    x = 233,058,397,541.06/487,000.70
  6. Step 6: Final answer
    x = 478,558.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.