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Finding the Fourth Proportional to 648,312.30, 971,302.05 and 555,000.30

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Solution

The fourth proportional to 648,312.30, 971,302.05 and 555,000.30 is: 831,501.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,312.30 : 971,302.05 = 555,000.30 : x
  2. Step 2: Convert to fraction form
    648,312.30/971,302.05 = 555,000.30/x
  3. Step 3: Cross multiply
    648,312.30x = 971,302.05 × 555,000.30
  4. Step 4: Simplify right side
    648,312.30x = 539,072,929,140.62
  5. Step 5: Solve for x
    x = 539,072,929,140.62/648,312.30
  6. Step 6: Final answer
    x = 831,501.93

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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.