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Finding the Fourth Proportional to 666,363.60, 918,936 and 564,381.36

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Solution

The fourth proportional to 666,363.60, 918,936 and 564,381.36 is: 778,299.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,363.60 : 918,936 = 564,381.36 : x
  2. Step 2: Convert to fraction form
    666,363.60/918,936 = 564,381.36/x
  3. Step 3: Cross multiply
    666,363.60x = 918,936 × 564,381.36
  4. Step 4: Simplify right side
    666,363.60x = 518,630,349,432.96
  5. Step 5: Solve for x
    x = 518,630,349,432.96/666,363.60
  6. Step 6: Final answer
    x = 778,299.34

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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.