Home / 900,109.53-1,242,151.47-512,913.87

Finding the Fourth Proportional to 900,109.53, 1,242,151.47 and 512,913.87

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Solution

The fourth proportional to 900,109.53, 1,242,151.47 and 512,913.87 is: 707,821.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    900,109.53 : 1,242,151.47 = 512,913.87 : x
  2. Step 2: Convert to fraction form
    900,109.53/1,242,151.47 = 512,913.87/x
  3. Step 3: Cross multiply
    900,109.53x = 1,242,151.47 × 512,913.87
  4. Step 4: Simplify right side
    900,109.53x = 637,116,717,603.89
  5. Step 5: Solve for x
    x = 637,116,717,603.89/900,109.53
  6. Step 6: Final answer
    x = 707,821.32

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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.