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Finding the Fourth Proportional to 579,505.70, 869,258.55 and 549,981.20

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Solution

The fourth proportional to 579,505.70, 869,258.55 and 549,981.20 is: 824,971.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,505.70 : 869,258.55 = 549,981.20 : x
  2. Step 2: Convert to fraction form
    579,505.70/869,258.55 = 549,981.20/x
  3. Step 3: Cross multiply
    579,505.70x = 869,258.55 × 549,981.20
  4. Step 4: Simplify right side
    579,505.70x = 478,075,860,439.26
  5. Step 5: Solve for x
    x = 478,075,860,439.26/579,505.70
  6. Step 6: Final answer
    x = 824,971.80

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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.