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Finding the Fourth Proportional to 486,587.80, 729,881.70 and 459,031.60

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Solution

The fourth proportional to 486,587.80, 729,881.70 and 459,031.60 is: 688,547.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,587.80 : 729,881.70 = 459,031.60 : x
  2. Step 2: Convert to fraction form
    486,587.80/729,881.70 = 459,031.60/x
  3. Step 3: Cross multiply
    486,587.80x = 729,881.70 × 459,031.60
  4. Step 4: Simplify right side
    486,587.80x = 335,038,764,561.72
  5. Step 5: Solve for x
    x = 335,038,764,561.72/486,587.80
  6. Step 6: Final answer
    x = 688,547.40

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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.