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Finding the Fourth Proportional to 708,309.48, 977,501.73 and 398,309.63

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Solution

The fourth proportional to 708,309.48, 977,501.73 and 398,309.63 is: 549,686.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,309.48 : 977,501.73 = 398,309.63 : x
  2. Step 2: Convert to fraction form
    708,309.48/977,501.73 = 398,309.63/x
  3. Step 3: Cross multiply
    708,309.48x = 977,501.73 × 398,309.63
  4. Step 4: Simplify right side
    708,309.48x = 389,348,350,635.79
  5. Step 5: Solve for x
    x = 389,348,350,635.79/708,309.48
  6. Step 6: Final answer
    x = 549,686.77

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.