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Finding the Fourth Proportional to 530,487.72, 732,070.98 and 288,783.72

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Solution

The fourth proportional to 530,487.72, 732,070.98 and 288,783.72 is: 398,520.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,487.72 : 732,070.98 = 288,783.72 : x
  2. Step 2: Convert to fraction form
    530,487.72/732,070.98 = 288,783.72/x
  3. Step 3: Cross multiply
    530,487.72x = 732,070.98 × 288,783.72
  4. Step 4: Simplify right side
    530,487.72x = 211,410,180,908.45
  5. Step 5: Solve for x
    x = 211,410,180,908.45/530,487.72
  6. Step 6: Final answer
    x = 398,520.40

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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.