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Finding the Fourth Proportional to 879,136, 1,213,207.68 and 476,728.32

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Solution

The fourth proportional to 879,136, 1,213,207.68 and 476,728.32 is: 657,885.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,136 : 1,213,207.68 = 476,728.32 : x
  2. Step 2: Convert to fraction form
    879,136/1,213,207.68 = 476,728.32/x
  3. Step 3: Cross multiply
    879,136x = 1,213,207.68 × 476,728.32
  4. Step 4: Simplify right side
    879,136x = 578,370,459,097.50
  5. Step 5: Solve for x
    x = 578,370,459,097.50/879,136
  6. Step 6: Final answer
    x = 657,885.08

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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.