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Finding the Fourth Proportional to 530,655.64, 732,318.72 and 288,948.40

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Solution

The fourth proportional to 530,655.64, 732,318.72 and 288,948.40 is: 398,756.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,655.64 : 732,318.72 = 288,948.40 : x
  2. Step 2: Convert to fraction form
    530,655.64/732,318.72 = 288,948.40/x
  3. Step 3: Cross multiply
    530,655.64x = 732,318.72 × 288,948.40
  4. Step 4: Simplify right side
    530,655.64x = 211,602,322,434.05
  5. Step 5: Solve for x
    x = 211,602,322,434.05/530,655.64
  6. Step 6: Final answer
    x = 398,756.38

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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.