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Finding the Fourth Proportional to 656,867.70, 985,690.35 and 432,875.70

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Solution

The fourth proportional to 656,867.70, 985,690.35 and 432,875.70 is: 649,569.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,867.70 : 985,690.35 = 432,875.70 : x
  2. Step 2: Convert to fraction form
    656,867.70/985,690.35 = 432,875.70/x
  3. Step 3: Cross multiply
    656,867.70x = 985,690.35 × 432,875.70
  4. Step 4: Simplify right side
    656,867.70x = 426,681,400,239.50
  5. Step 5: Solve for x
    x = 426,681,400,239.50/656,867.70
  6. Step 6: Final answer
    x = 649,569.77

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Double scale
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1.5x scale

Why These Related Problems?

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